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Atoms and reactions

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Question 49
79%

A sample of copper contains the isotopes 63Cu^{63}\text{Cu}63Cu and 65Cu^{65}\text{Cu}65Cu. The relative atomic mass of the copper sample is 63.5. What is the percentage of 63Cu^{63}\text{Cu}63Cu atoms in the sample of copper?

A

25%25\%25%

B

35%35\%35%

C

65%65\%65%

D

75%75\%75%

Markscheme

Atoms and reactions Questions

  1. A Level
  2. /Chemistry
  3. /Atoms and reactions

199 exam-style questions on OCR A A Level Chemistry Atoms and reactions, covering Atomic structure and isotopes, Compounds, formulae and equations, Amount of substance, Acids, and Redox. Each one has a worked solution and a mark scheme showing where the marks go.

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